What does it mean when a guy calls you 'radiant'?

[Anonymous]

What does it mean when a guy calls you 'radiant'?

[_Maya_]

It means exactly what it means. You looked radiant in some way. If you need the definition and don't feel bothered to Google it I have done it for you. Didn't take any time at all.

"sending out light; shining or glowing brightly"

So that means the guy thought you had a glow about you. Maybe you were in a particularly good mood. Maybe you just looked fantastic. Maybe got your makeup just spot on that day. Whatever the case is that is what it means and how the guy that said it perceived your looks on that day.